I confirm that manually editing the /usr/share/X11/xkb/symbols/keypad file to change the ossmath configuration (replacing FOUR_LEVEL_X with CTRL+ALT and adding VoidSymbol in the entries fpr KPDV, KPMU, KPSU and KPAD) and restarting the gnome session does solve the problem.
Once the Gnome session is restarted, the fr1/fr2 swith at in the top bar of the gnome-shell desktop responds correctly, and the keyboard layout switches accordingly, even in application already launched. I hope the fix will be applied to the debian packaging of xkb. Thanks a lot, Luc -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org